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Old 02-25-2013, 04:10 PM   #1
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Attention - Check you HWH Leveler System Wiring

Check you HWH leveling system for proper grounding. Here is a pic of the wire that caused me the issues.

This is in the compartment with the Hydraulic pump. This is the wiring harness part number.



The wire below the few black wires I'm holding has no insulation as it has melted off.



Blurry pic but shows the white insulation.




Mine gave basically no warning other than being slow to retract the slide this morning. I had 8000 trouble free miles under my belt with this one.

HWH has been fantastic with the telephone support. Ultimately what we found is that the unit is not grounded correctly and burned up the small grounding wired in the control circuits. They had me clamp a jumper cable to the pump housing and the other to a good ground and off she went.

They contacted Tiffin and they are sending a grounding strap. HWH is sending a new modulator and a 32 pin pigtail that I will have to solder into the old harness. I would much rather do it than take it in to be done.
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Old 02-25-2013, 05:50 PM   #2
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Wow, I cant believe they melted off. Seems like a serious defect. Thanks for sharing.
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Old 02-25-2013, 06:28 PM   #3
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Not serious if you know how to solve it...which is why I posted it. Grounding is your friend!
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Old 02-27-2013, 03:59 PM   #4
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Holy cow they just sent me a serious grounding cable. Can someone with a similar rig see where your HWH pump is grounded with a cable like this? Pics please?


Here is my pump.


Here is the cable they sent.
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Old 02-28-2013, 06:11 PM   #5
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Well I soldered in the 26 pin connector and replaced the manifold on top of the pump tonight. Added the 2/0 grounding cable and now she's working like a champ. I tried not to act surprised when my wife cycled the slide and ran the jacks up and down...
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Old 03-01-2013, 12:30 PM   #6
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[QUOTE=coachmanrvr;1478931]Holy cow they just sent me a serious grounding cable. Can someone with a similar rig see where your HWH pump is grounded with a cable like this? Pics please?


Are you sure they didn't send a ground for lightning strikes by mistake? Impressive. Thanks for sharing
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